After having tried it for a while and reached the point where the thing begins to fragment due to lack of things to be implemented (zombie, leopard, etc.) and before ruining the experience due to those faults for the moment, I am left with the experience of what following.
Dev, if you read this, have you considered changing the title of the game / project?
Many (including myself before) for saying that it was a parody without more, I had low expectations and even avoided contact with this project, but after trying it, although it isn´t a new marvel or the story or implementation model of the gameplay or the scenes It´s nothing new, at least, for the bases that you implemented, the plot and the setting, the game is more entertaining than one thinks at first and with a little more work (although it is on a scale between minor and medium) It can become a fun experience as well as entertaining, that beyond the porn that is also decent (please give the ghost more time and love), it can recreate classic experiences such as those offered in its day as example: Mystery of the monkey island, King's quest, etc., of course, as indicated above, on a scale between low or medium only because of the model and stubbornness that gives the game is developed in Renpy, instead of Unity or another , but getting back to the point ... In my humble opinion I think that you should change the name of the game / project in order to encourage more people to come and support this project, especially considering that except for the appearance one or another creature from the game to parody and some few elements, this game because of the implementation of creatures (and those that are yet to be brought) like monstergirls and role creatures rather than parody, it already fits perfectly as a very full story that at a minimum, one must respect and even appreciate, above all, given to that titles that have these elements and know how to carry it well are few and it is necessary to have titles like this that know how to maintain the balance well and not that it is only a context-base of excuse to reach scenes without more.
That if and because I didn´t check other routes other than the ghost (for me, the canon, since the succubus or the demon I think they are unreal routes for what the game wants to transmit [I know that as the ghost they aren´t "so" helpers, but from the meaning of the castle, one should not even listen to the slightest information but from the research that one carries out by any means, it must be that one can put together the puzzle of the story]) I think you should raise the level a little risk of the encounters or being better, add another threat or situation that makes things more difficult, because, unless one seeks a "pacifist" route after unlocking a partner (bubble, bubble), encounters after that point are very easy to handle (at least for zone 1) and for the joke of what you want to transmit, I think it should be a little more difficult or if this is not what you are looking for, you could enter elements such as hunger, sleep, tiredness or a measurer that as one advances or does something, this detonates in a battle event or event of something, so that one cannot go full without rest or care (because it is quite easy to reload the save, do anything to change the event trigger and continue like nothing).
Anyway, without anything else to add, a fun experience, I look forward to seeing the future of this project, good job.